[GitHub] [commons-pool] reda-alaoui commented on pull request #209: NullPointerException can occur in GenericObjectPool#use

[GitBox <gi...@apache.org>]

reda-alaoui commented on PR #209:
URL: https://github.com/apache/commons-pool/pull/209#issuecomment-1385794431

   Hello @kinow ,
   
   It happened via commons-dbcp.
   Here is a part of the stacktrace:
   ```java
   Caused by: java.lang.NullPointerException: Cannot invoke "org.apache.commons.pool2.PooledObject.use()" because "wrapper" is null
                   at org.apache.commons.pool2.impl.GenericObjectPool.use(GenericObjectPool.java:1299)
                   at org.apache.commons.pool2.proxy.BaseProxyHandler.doInvoke(BaseProxyHandler.java:77)
                   at org.apache.commons.pool2.proxy.JdkProxyHandler.invoke(JdkProxyHandler.java:50)
                   at jdk.proxy8/jdk.proxy8.$Proxy1669.commit(Unknown Source)
                   at org.apache.commons.dbcp2.DelegatingConnection.commit(DelegatingConnection.java:191)
                   at jdk.internal.reflect.GeneratedMethodAccessor702.invoke(Unknown Source)
                   at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                   at java.base/java.lang.reflect.Method.invoke(Method.java:568)
                   at net.ttddyy.dsproxy.proxy.ConnectionProxyLogic.performQueryExecutionListener(ConnectionProxyLogic.java:112)
                   at net.ttddyy.dsproxy.proxy.ConnectionProxyLogic.access$000(ConnectionProxyLogic.java:25)
                   at net.ttddyy.dsproxy.proxy.ConnectionProxyLogic$1.execute(ConnectionProxyLogic.java:50)
                   at net.ttddyy.dsproxy.listener.MethodExecutionListenerUtils.invoke(MethodExecutionListenerUtils.java:41)
                   at net.ttddyy.dsproxy.proxy.ConnectionProxyLogic.invoke(ConnectionProxyLogic.java:47)
                   at net.ttddyy.dsproxy.proxy.jdk.ConnectionInvocationHandler.invoke(ConnectionInvocationHandler.java:25)
                   at jdk.proxy8/jdk.proxy8.$Proxy1670.commit(Unknown Source)
                   at jdk.internal.reflect.GeneratedMethodAccessor702.invoke(Unknown Source)
                   at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                   at java.base/java.lang.reflect.Method.invoke(Method.java:568)
                   at org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy$LazyConnectionInvocationHandler.invoke(LazyConnectionDataSourceProxy.java:378)
                   at jdk.proxy8/jdk.proxy8.$Proxy2199.commit(Unknown Source)
                   at jdk.internal.reflect.GeneratedMethodAccessor702.invoke(Unknown Source)
                   at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
                   at java.base/java.lang.reflect.Method.invoke(Method.java:568)
                   at org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy$TransactionAwareInvocationHandler.invoke(TransactionAwareDataSourceProxy.java:238)
                   at jdk.proxy8/jdk.proxy8.$Proxy2199.commit(Unknown Source)
                   at org.hibernate.resource.jdbc.internal.AbstractLogicalConnectionImplementor.commit(AbstractLogicalConnectionImplementor.java:86)
                   at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceL
   ocalTransactionCoordinatorImpl.java:282)
   ```
   
   > and preferably update the PR with a unit test to reproduce the exception, please?
   
   I don't know how to reproduce the full issue, sorry. Do you want a very basic unit test that will check the case where pool is empty for example?


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